Highly contaminated river otters (Lontra canadensis) are effective biomonitors of environmental pollutant exposure.

River otters (Lontra canadensis) are apex predators that bioaccumulate contaminants via their diet, potentially serving as biomonitors of watershed health. They reside throughout the Green-Duwamish River, WA (USA), a watershed encompassing an extreme urbanization gradient, including a US Superfund site slated for a 17-year remediation. The objectives of this study were to document baseline contaminant levels in river otters, assess otters' utility as top trophic-level biomonitors of contaminant exposure, and evaluate the potential for health impacts on this species. We measured a suite of contaminants of concern, lipid content, nitrogen stable isotopes (δ15N), and microsatellite DNA markers in 69 otter scat samples collected from twelve sites. Landcover characteristics were used to group sampling sites into industrial (Superfund site), suburban, and rural development zones. Concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ether flame-retardants (PBDEs), dichlorodiphenyl-trichloroethane and its metabolites (DDTs), and polycyclic aromatic hydrocarbons (PAHs) increased significantly with increasing urbanization, and were best predicted by models that included development zone, suggesting that river otters are effective biomonitors, as defined in this study. Diet also played an important role, with lipid content, δ15N or both included in all best models. We recommend river otter scat be included in evaluating restoration efforts in this Superfund site, and as a potentially useful monitoring tool wherever otters are found. We also report ΣPCB and ΣPAH exposures among the highest published for wild river otters, with almost 70% of samples in the Superfund site exceeding established levels of concern.

Depression leads to incident vascular disease: evidence for the relevance to primary care.

BACKGROUND: Depression is a known risk factor for vascular disease in community cohorts and in large, system-wide, health care databases. It is not known if the association between depression and incident vascular disease exists when patient data is restricted to depression presenting in primary care. METHODS: Data were from a medical record registry capturing all primary care encounters at a large academic medical practice from 2008 to 2013. From 27,225 registry patients, we identified 7383 patients free of vascular disease for 18 months prior to baseline. ICD-9-CM codes were used to define depression and vascular disease. Volume of health care use, demographics and comorbid diagnoses were obtained from the patient data registry. Cox proportional hazard models with time dependent covariates were computed to measure the association between depression and incident vascular disease before and after adjusting for covariates. RESULTS: Of the 7383 patients initially free of vascular disease, 14% were diagnosed with depression and 8.6% developed vascular disease. Incident vascular disease was significantly (P < 0.01) higher among patients with depression (12.7%) compared to those without depression (7.9%). In the unadjusted model, depression was associated with a 49% increased risk of developing vascular disease (odds ratio [OR] = 1.49; 95% confidence interval [CI]: 1.19-1.86) and this association remained significant after adjusting for all potential confounders (OR = 1.28; 95% CI: 1.02-1.62). CONCLUSIONS: The association between depression and incident vascular disease is observed in patients diagnosed and managed by primary care physicians. Primary care physicians have an opportunity to impact this association. Guidelines for primary care providers are needed to prompt aggressive depression treatment and vascular disease screening.

Binge drinking in the context of romantic relationships.

This study examined consequences of binge drinking on relationship conversation qualities (positive tone, general disagreements, drinking disagreements, and talks about drinking) among romantically involved college students. Conversation qualities were predicted with three binging variables: (a) same day binging, (b) prior day binging, and (c) total amount of binging reported. The participants (N=156) completed 10 daily diaries of relationship conversations as well as drinking behaviors. Same day binging increased the occurrence of both drinking disagreements and talks about drinking. However, prior day binging was not associated with any of the four conversation qualities examined. Greater numbers of binges over the duration of the study were associated with less overall positive tone, and more general disagreements, drinking disagreements, and talks about drinking. The implications of the findings for student drinking patterns and relational quality are discussed.

Risky and protective contexts and exposure to violence in urban African American young adolescents.

Contexts of risk for and protection from exposure to violence were identified and the relation of exposure to violence to delinquent behaviors and symptoms of trauma was examined. Using the Experience Sampling Method (ESM), the immediate daily experience of risky and protective contexts was examined. One hundred sixty-seven African American 6th-, 7th-, and 8th-grade children from urban neighborhoods carried watches and booklets for 1 week. Structural equation modeling supported the hypotheses that more time in risky contexts and less time in protective contexts was related to more exposure to violence. Exposure to violence partially mediated the relation of time in protective and risky contexts to delinquent behaviors, assessed with the Juvenile Delinquency Scale and the Child Behavior Checklist, and distress levels, assessed by a posttraumatic stress disorder (PTSD) score.